package com.mystudy.dataStructure.stack;

import com.mystudy.dataStructure.link.LinkedList;

public class LinkedListStack<E> implements Stack<E> {
    private LinkedList<E> list;

    public LinkedListStack() {
        this.list = new LinkedList();
    }

    @Override
    public int getSize() {
        return list.getSize();
    }

    @Override
    public boolean isEmpty() {
        return list.isEmpty();
    }

    @Override
    public void push(E e) {
        list.addFirst(e);
    }

    @Override
    public E pop() {
        return list.removeFirst();
    }

    @Override
    public E peek() {
        return list.getFirst();
    }

    @Override
    public String toString() {
        StringBuilder ref = new StringBuilder();

        ref.append("Stack pop ");
        ref.append(list);
        return ref.toString();
    }
}
